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  • Title: Improved survival in women versus men with merkel cell carcinoma.
    Author: Tam M, Luu M, Barker CA, Gharavi NM, Hamid O, Shiao SL, Nguyen AT, Lu DJ, Ho AS, Zumsteg ZS.
    Journal: J Am Acad Dermatol; 2021 Feb; 84(2):321-329. PubMed ID: 32423829.
    Abstract:
    BACKGROUND: Studies have observed that women have better outcomes than men in melanoma, but less is known about the influence of sex differences on outcomes for other aggressive cutaneous malignancies. OBJECTIVE: To investigate whether women and men have disparate outcomes in Merkel cell carcinoma (MCC). METHODS: Patients with nonmetastatic MCC undergoing surgery and lymph node evaluation were identified from the National Cancer Database (NCDB) and the Surveillance, Epidemiology, and End Results (SEER) database. Kaplan-Meier analysis and Cox proportional hazards regression models were used for overall survival, and competing-risks analysis and Fine-Gray models were used for cause-specific and other-cause mortality. RESULTS: The NCDB cohort (n = 4178) included 1516 (36%) women. Women had a consistent survival advantage compared with men in propensity score-matched analysis (66.0% vs 56.8% at 5 years, P < .001) and multivariable Cox regression (hazard ratio, 0.68; 95% confidence interval, 0.61-0.75; P < .001). Similarly, women had a survival advantage in the SEER validation cohort (n = 1202) with 457 (38.0%) women, which was entirely due to differences in MCC-specific mortality (5-year cumulative incidence: 16.4% vs 26.7%, P = .002), with no difference in other-cause mortality (16.8% vs 17.8%, P = .43) observed in propensity score-matched patients. LIMITATIONS: Potential selection bias from a retrospective data set. CONCLUSION: In MCC, women have improved survival compared with men, driven by MCC-related mortality.
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